Category: Azure

Configure Azure ATP

In this post we are going to go through configuring Azure Advanced Threat Protection (Azure ATP), ATP  is a cloud tool that can be used to detect security issue with on-premises active directory.

https://azure.microsoft.com/en-us/features/azure-advanced-threat-protection/#security

Azure ATP is available as part of Enterprise Mobility + Security 5 suite (EMS E5), and as a standalone license. You can acquire a license directly from the Microsoft 365 portal or through the Cloud Solution Partner (CSP) licensing model.

Azure ATP uses agent sensor installed on domain controllers or as standalone deployment that used port mirroring to monitor and analyzes user activities and information across your network.

We will be using the agents in this post since I can installing software on my DC if you have a policy that restrict agents installed on DC then you can use standalone deployment.

To configure Azure ATP first step it to setup an ATP workspace.

Go to https://portal.atp.azure.com/ and use your Azure AD logonATP0Once the workspace has been created we need to configure the on-premises connection account. ATP1Put in details for the domain account, I used a service account that has read access to AD so that I could restricted the logon to the account to only be used for ATP ATP2Once AD details are added next step is to download and install the sensor agent. Go to sensors and download the setup exe and copy the access key as this will be required during the install. ATP3Copy the installer to the DC and run. ATP4Select required language. ATP5Deployment type will be sensor I am running on VMware and this will generate the below warning which will redirect to a guide to disable IPv4 TSO Offload. ATP6This is where we need to put in the access key so that the sensor is associated to the correct workspace. ATP7The agent should now start to install. ATP8ATP9Once the agent has install it can take some time for it to respond in Azure ATP.ATP10Now the agent should start to notify of any suspicious activity that run’s like reconnaissance on SMB,  DNS and other malicious reconnaissance.

We can also create HoneyToken account that will be dummy account that can be used to attracted attackers and will automatically generated an alert as they should never be used.

Go to Entity tags >Honeytoken and select the account that will be used as the HoneytokenATP13We can also add sensitive account and group, there are default groups/ accounts that are considered sensitive by default like Administrators, Domain admins, Enterprise admins…, a full list of these can be found in the below link.

https://docs.microsoft.com/en-us/azure-advanced-threat-protection/sensitive-accountsATP14If we now logon with the HoneyToken account it will then alert the activity by this account. ATP15We can also run reports or schedule reports for schedule reports. To run a report go to the reporting blade and change the date to the range you want and click download. ATP16Below is an example of the modification to sensitive groups. ATP17To scheduled reports go to configuration and scheduled reports. ATP18ATP19

 

 

Configure Azure Arc for servers

Azure Arc for servers is a tool that can be used to add on-prem physical / virtual servers or servers running in other cloud providers to Azure, this allow these servers to be centrally organised and to be connected to Azure services like Azure policy or log analytics.

Azure Arc for servers is in public preview, so this should not be used on production system until there is a full release version. Currently the only support OS version’s are below.

  • Windows Server 2012 R2 and newer
  • Ubuntu 16.04 and 18.04

If there is a content filter or proxy, the URL’s in the below link will  need to be white-listed all traffic will go over HTTPS (Port 443)

https://docs.microsoft.com/en-us/azure/azure-arc/servers/overview#networking-configuration

To add a server to Azure Arc, logon to the Azure portal.

Go to All services > Machines – Azure ArcArc13

Click on create machine – Azure ArcArc1There are two options add machines using interactive script or add machines at scale. In this post we will be using the scripted method. Arc2

Select the subscription, resource group and region. When selecting  the operating system we can chose between Windows or Linux. Windows will create a PowerShell script and Linux will create a Linux .sh script.Arc3

As this feature is currently preview it will ask you to register before completing the download. Arc4Arc5Once the registration is completed, we can either copy the command or click download to get a copy of the PowerShell script. Below is how the script should look the only difference would be the Azure specific setting like resource group, tenantid…Arc6Once the script has run and the connect command has completed it will request that we connect to the device login site https://Microsoft.com/devicelogin and put in the authentication code. Arc7Arc8

Once completed go back to the PowerShell windows that the script was run from and we should see successfully onboarded to Azure resource.Arc9After a few minutes the device should show in Azure Arc. Arc10We can now apply Azure policies .Arc11

There are some additional steps required to configure the servers to integrate with Azure log analytics.

First step is to install the MMA (Microsoft Monitoring Agent) agent, to download the agent go to Log Analytics workspace and select the require workspace > Advanced settings

Arc14

Select the required connection source, then OS version. We will also need to take note of the workspace ID and Primary Key which will be used during the agent install to connect to the log workspace.Arc15

Go through the agent install.Arc16

Select Azure connect the agent to Azure Log Analytics (OMS).Arc22

To connect to Azure log analytics put in the workspace id and key.Arc18

Once the install has finished we can check the agent in control panel > All Control Panel Items > Microsoft monitoring agent.Arc20

We should now be able to query log from the server in Azure Arc for servers. Arc21

 

Configure Azure Site Recovery for VMware

Azure site recovery (ASR) is a DR / Migration tool from Microsoft and can be used to configure DR between data centers or Azure.

In this post we will be going through setting up ASR to replicate a VM from VMware to Azure.

There are some limitations for ASR these are listed the below link

https://docs.microsoft.com/en-us/azure/site-recovery/vmware-physical-azure-support-matrix

The main limits for VMware are guest disk need to be less than 4TB and vCenter needs to be at least 5.5.

I have a previous post on how to configured a recovery service vault so I wont be going over that again but if you need to configure here is the previous post.

https://thesleepyadmins.com/2018/11/23/azure-vm-backup-using-azure-recovery-service-vault/

Logon to Azure

Go to Recovery Services vaults

ASR1Go to the already configure vault, select Site Recovery and click on prepare infrastructureASR2Once the wizard has started select the require goalsASR3I am not running the planning tools as this is a test but it is recommended to run before starting a deployment to verify the required bandwidth. ASR4Next we will download the OVA appliance that will be imported to VMwareASR5Once the OVA has been downloaded and imported to VMware on boot up the server will require you to read / accept a licence agreement and provide an administrator password.

Give the server a name (this will show up in as the configuration server in Azure after the setup as been completed)ASR6Next step is to sign in to Azure tenant that the server will connect to for replicationASR8Next we will go through the configuration steps first step is to set the interface that will be used to connect to on-prem devices & connection back to Azure there can be two different NIC’s assigned if required. ASR9Next is to configure the Recovery vault that will be used, select the subscription, the recovery vault RG and recovery service vault that has been configured. ASR10Install the MySQL software ASR11Next a validation test will run. (I am getting a warring for memory and CPU as I didn’t have enough memory / CPU and had to edit the VM to run on less resource but it will still complete)ASR12Next is to connect to the vCenter server that is running the VM’s that are to be replicated to Azure. ASR13Last step will configure the configuration server in Azure.ASR15Once this has been completed we can go back to the Azure portal and we should now see the configuration server show under prepare infrastructure setupASR16

Select the subscription and deployment model to be used for failover I am using Resource ManagerASR17Next create a replication policy to apply to the ASR configuration server. ASR18ASR19Once the configuration is done we can now protect and replicate our on-prem VM’s , go back to site recovery and select step 1: Replicate Application ASR20Select source, source location (Configuration server on-prem)Machine type (Physical / virtual), vCenter (If virtual) and the process serverASR21Select the subscription, RG that the VM will replicate too and the deployment modelASR22Next select the server that will be replicated the VM must be powered on and be running VMware tools be available for replication other wise they will be grey-outASR23Select the required disk type, storage account ASR24last step is to assign the policy required (Multiple policy can be created base on the recovery time requirements and retention times)ASR25

Last step is to enabled replication

ASR26

Once enabled check the site recovery jobs to see the progressASR27Once replication has completed we can create a recovery plan, go to recovery Plans (Site Recovery and select Recovery planASR28Give the plan a name, select source, target , deployment type and select the VM’s that will be added to the recovery.ASR29ASR31

Azure Migrate Services Setup

With more companies looking to move workloads from on-prem to cloud providers, it can be difficult to work out the cost for current workloads.

In Azure we can utilize Azure Migrate Services.

At the time of this post VMware is only supported, this will be extended to Hyper-v in future releases. VMware VMs must be managed by vCenter Server version 5.5, 6.0, 6.5 or 6.7.

In this post we will be going through the process off assessing the on-prem VMware environment and view the assessment report.

The environment we will be assessing is VMware vCenter 6.7 and ESXi 6.7 and a VM running Windows Server 2016.

The architecture of the Azure Migrate Service is shown in the following diagram

AZMIG

Below is the process

  • Create a project: In Azure, create an Azure Migrate project
  • Discover the machines: Download collector VM as an OVA and import to vCenter
  • Collect the information: The collector collects VM metadata using VMware PowerCLI cmdlets. Discovery is agentless and doesn’t install anything on VMware hosts or VMs. The collected metadata includes VM information (cores, memory, disks, disk sizes, and network adapters). It also collects performance data for VMs
  • Assess the project: The metadata is pushed to the Azure Migrate project. You can view it in the Azure portal.

Logon to Azure

Go to All services search for migration projectAZMIG_1

Select Create migration project

AZMIG_2

Give the project a Name, subscription, Resource group & Geography

AZMIG_3

Select Discover & Assess AZMIG_4

Select Discover and Assess. then Discover machines AZMIG_5download OVA. The system requirement for the OVA are:

CPU: 8 vCPU’s; Memory: 16GB; HardDrive: 80GBAZMIG_6

Next step is to import the OVA to VMware

Go to vCenter

AZMIG_7

Browse to the OVA file location and selectAZMIG_8Select the Name and location of the OVAAZMIG_9Select the destination cluster AZMIG_10Click NextAZMIG_11Select destination data store and specify either thick or thin provisioned diskAZMIG_12Select the port group tha the VM will useAZMIG_13Review and confirm settingsAZMIG_14

Once the OVA is imported, power on the VM

Read and accept the license terms and give the collector an admin password.

Log into the VM and run the connector utility on the desktop.

AZMIG_15

Got through the prerequisites checksAZMIG_16

Next step is to connect to the vCenter. Put in the vCenter IP or hostname, Username / Password and once connect select the cluster or host that is currently running the VM’s that need to be assessed for migration.

AZMIG_17

Next step is to connect back to Azure using the migration project credentials that were generated when creating the projectAZMIG_19AZMIG_18

Click continue and the last screen will start the discovery this can take a while to complete (60 minutes or so)AZMIG_20

Once the discovery has completed, we then need to Create assessmentAZMIG_21

Create a new group and select the VM that will be assessedAZMIG_22

Once this has completed go to Overview and click on the assessmentAZMIG_23

Once in the assessment you can see the readiness of your VM and the Monthly estimated cost for running the workloads and AZMIG_24

Click on the VM to view specific details and performance statsAZMIG_25

We can now see what the cost will be for migrating workloads to Azure and this can be presented to give a better understanding of the cost savings that can be achieved with cloud migrations.

 

 

 

 

Azure Configure vNet peering

To allow communication between vNet’s in Azure we can set up peering connections. This is useful if there is a need to have different vNet’s for things like web app’s and backend database zones.

To configure peering we will require two different vNets both must be in the same Azure region.

Currently when I try to ping a VM that is running in a different vNet there is no communication.vNet01

Logon to Azure

Go to All services > Virtual networksvNet04

Once in Virtual networks select the network that will be configure for peeringvNet02

Once the network blade is open go to peering > AddvNet03

Enter a Name, select the Subscription that the other vNet is in. Then Select the Virtual Network. Under configuration select Enabled and the last step tick Allow forwarded trafficvNet05

Below are some details on three options:

Allow forwarded traffic: This setting allows the peer’s forwarded traffic (traffic not originating from inside the peer virtual network) into your virtual network.
Allow gateway transit: Allows the peer virtual network to use your virtual network gateway. The peer virtual network cannot already have a gateway configured, and must select ‘use remote gateway’ in its peering settings.
Use remote gateway: You will need to Select this option if you wish to use your peer’s virtual network gateway. The peer virtual network must have a gateway configured, as well as ‘allow gateway transit’ enabled. Only one peering in this virtual network can have this enabled. You cannot use this setting if you already have a gateway configured in your virtual network.

Once all settings are confirmed click ok to create the peeringvNet06vNet07

Two allow communication both ways, there will need to peering setup on the App network aswell.

Once both are enabled we can now see response to ping requestsvNet08

To lock down communication between the networks we can add NSG’s to restricted what inbound and outbound traffic is allowed from the subnet’s.

Configure MFA For Azure Application Proxy

On the last post we setup Azure Application Proxy to allow internal application’s to be made available externally using AAD integration.

To add additional security to the setup we can enable MFA for the group or users that will be allowed access.

To enable MFA we need to create a conditional access policy and enable on the application proxy.

First step Login to Azure

Go to Azure Active Directory (AAD)AZ1

Go to Enterprise applications

AZ3

Select the Application proxy that will require MFA to be enabledMFA6

Once in the Application proxy go to Conditional Access and select New policyMFA1

Give the policy a meaningful name as it will appear in the overall Conditional Access policy’s aswell as on the Application. This will make it easier to manage if there are multiple policy’s.

Then select Users and groups and select the required users or groupMFA2

Next select the cloud apps that will require MFA in this case it is the Exchange ECP application that was configured previouslyMFA3

We will not setup conditions but if this is required it can be set to only allow access from certain devices types, location & sign-in risk level.

Next go to Access controls and then Grant tab. Select Grant access, tick Require multi-factor authentication and Requires one of the selected controls MFA4

Last step is to Enable the policy

MFA7

Click create at the bottom of the policy

The policy should now show and have tick under Enabled MFA5

Now when we try to access the ECP Application proxy URL,

we should be prompted for MFA MFA8

and asked to register and verify a device to be use for MFAMFA9

It is a good idea to enable MFA for application as it gives an additional layer of security.

Configure Azure Application Proxy To Access Internal Application

To access internal applications we can use Azure Application proxy to integrate with Azure AD and allow remote access to internal resources.

To use Azure Application Proxy requires Azure AD basic,  Premium P1 or Premium P2 subscription.

An Account with Global administrator rights

The Azure application proxy connector requires Windows Server 2012 R2 or later

Below are pre-req ports and URL’s

See link below to Microsoft documentation

https://docs.microsoft.com/en-us/azure/active-directory/manage-apps/application-proxy

Port number How it’s used
80 Downloading certificate revocation lists (CRLs) while validating the SSL certificate
443 All outbound communication with the Application Proxy service
URL How it’s used
*.msappproxy.net
*.servicebus.windows.net		 Communication between the connector and the Application Proxy cloud service
mscrl.microsoft.com:80
crl.microsoft.com:80
ocsp.msocsp.com:80
http://www.microsoft.com:80		 Azure uses these URLs to verify certificates
login.windows.net
login.microsoftonline.com		 The connector uses these URLs during the registration process.

The following diagram shows how Azure AD and Application Proxy work together to provide single sign-on to on-premises applications.azureappproxxy

To start we need to download and configure the proxy connector

Login to Azure

Go to Azure Active Directory (AAD)AZ1

Once in AAD go to Application proxy

AZ2

Click Download connector serviceAPinstall0

Once downloaded run the MSI on the server that will be used as the application proxy connector (I used a server in a DMZ zone). It will prompt for an Azure account with Global admins rights.

Once configured the server should now show in the application proxy tabAPinstall4

Once connected and active next step is to configure application

Go to AAD and Enterprise applications

AZ3

Once in Enterprise applications click on New application APinstall7

Click on On-premises applicationAPinstall8

Below is a description for each field and option available in the application proxy

Name:
The name of the application that will appear on the access panel and in the Azure portal.

Internal URL:
The URL for accessing the application from inside your private network. You can provide a specific path on the backend server to publish, while the rest of the server is unpublished. In this way, you can publish different sites on the same server as different apps, and give each one its own name and access rules.
If you publish a path, make sure that it includes all the necessary images, scripts, and style sheets for your application. For example, if your app is at https://yourapp/app and uses images located at https://yourapp/media, then you should publish https://yourapp/ as the path. This internal URL doesn’t have to be the landing page your users see. For more information, see Set a custom home page for published apps.

External URL:

The address for users to access the app from outside your network. If you don’t want to use the default Application Proxy domain, read about custom domains in Azure AD Application Proxy.

Pre Authentication:
How Application Proxy verifies users before giving them access to your application.

Azure Active Directory – Application Proxy redirects users to sign in with Azure AD, which authenticates their permissions for the directory and application. Microsoft recommend keeping this option as the default, so that you can take advantage of Azure AD security features like conditional access and Multi-Factor Authentication. Azure Active Directory is required for monitoring the application with Microsoft Cloud Application Security.

Passthrough – Users don’t have to authenticate against Azure Active Directory to access the application. You can still set up authentication requirements on the backend.

Connector Group:
Connectors process the remote access to your application, and connector groups help you organize connectors and apps by region, network, or purpose. If you don’t have any connector groups created yet, your app is assigned to Default.
If your application uses WebSockets to connect, all connectors in the group must be version 1.5.612.0 or later.

 

Fill out the details required. I am using passthrough for pre authentication for the web site but this can be changed to AAD which then requires authentication before the site can be accessed.

(I created a basic IIS page on an internal web server to test with)APinstall9

Next step copy the external URL and try to access the site. There should be no prompt and the site should load

(Yay my lovely test site is available 🙂 )APinstall13

I decided to also allow access to my internal Exchange server and to also test the AAD pre-authentication.

First create a second application proxy and set the Pre Authentication to Azure Active DirectoryAPinstall14

I wanted to use a custom domain name for the second application proxy so I changed the external URL to the custom domain name in Azure.

Once a custom domain is selected we can add a certificate to match the URL.

There will be a warning that a CNAME entry will be required to point from the custom URL to the msappproxy.net addressAPinstall18

(This will require a CNAME record to be created on public DNS server that will map the application proxy to msappproxy.net)CNAME

Once configured we need to add a user or group to allow access.

Go to the application proxy, select the required application proxy and click on Users and groups, Add user and select either the user or group that will be allowed accessAPinstall16APinstall15

Copy the link for the application proxy.

Unless a valid cert was also uploaded you will receive a cert error click continue to site.

It should now prompt for AAD authentication. Use an account that has access right to the proxyAPinstall11

Once logged in the ECP page should now show. APinstall10

 

 

Azure Network Security Groups (NSG) to Restrict Management Access

For security reasons it is good practice to lock down access to Azure resources and not leave management ports open to the internet.

One way to restrict access to remote access protocols like RDS / SSH is to create a Network Security Groups (NSG) and apply this to either virtual machines or virtual network subnets.

To create a NSG

Logon on to the Azure portal: https://portal.azure.com

Once logged on go to All Services > Network security groups

If you have created VM’s or other resources there might already be some pre-existing NSG’s.NSG1

To create a new NSG click on Add

Give the NSG a name, assign subscription, resource group and locationNSG2

Once the deployment has completed, click on the NSG this will bring up the configuration page.

First part is to configure the inbound security rules. NSG4

Go to settings > Inbound security rules

Once in Inbound security rules. To add a rule click add.

I want to restrict access to a specific Public IP for RDP access. Set the source as IP Addresses and add in the IP that will be allowed this can be a full range or a single IP depending on network subnet bit. I am only going to add one address so I used /32 below is an example 10.10.10.92/32.

I left source port ranges and destination as default as I don’t want to restrict these.  Choose the required port in this case its 3389, set protocol to Any if you require both TCP/UDP I only need TCP.  Set action to allow, set priority value and last step is give the port a name / description. NSG5

Below is the updated rule I have marked out my public IPNSG6

The outbound rule is set to allow any/any by default so if there is a requirement to lock down certain ports then create a new rule here to block the required ports.

Last step once all rule have been configured is to apply the NSG against resources. I am going to apply the policy to both my subnet and NIC’s assigned to both my test VM’s.

The policy should only need to be applied to either the subnet or VM’s,  I just want to show how to apply to both. If you apply a rule to both VM and subnet they need to match or any port that is not allowed on both wont be work.

To assign to subnet: go to settings > SubnetsNSG7

Select virtual network and subnet. NSG8NSG9

To apply to each VM Nic: Go to settings > network interfaces

As I already had NSG’s associated from the VM deployments I need to re-associate to the new NSG.

Select the NSG of the VM you want to move and go to network interfacesNSG10NSG11

Chose the required NSG

NSG12

Once applied I can now only access the VM’s from my own network.

 

 

 

 

Azure VM Backup using Azure Recovery Service Vault

In this post I am going to go through setting up a weekly backup for VM’s using Azure Recovery Service Vault.

Recovery Services vaults protect:

  • Azure Resource Manager-deployed VMs
  • Classic VMs
  • Standard storage VMs
  • Premium storage VMs
  • VMs running on Managed Disks
  • VMs encrypted using Azure Disk Encryption
  • Application consistent backup of Windows VMs using VSS and Linux VMs using custom pre-snapshot and post-snapshot scripts

To backup a single VM we can click on the VM and go to backup and configure the Recovery Vault. I want to add all my servers at one time so I will create Recovery Vault first.

Logon on to the Azure portal: https://portal.azure.com

Once logged on go to All Services > Recovery Services vaults

Once in Recovery Services vaults click createRSV1

Give the Recovery Vault a Name, assign a subscription, resource group and location.

RSV2

Once the deployment has finished,  click on the newly create object. RSV3

First thing I am going to set the backup configuration to locally-redundant as this is just for my Lab VM’s and it will save on cost.

Go to Manage > Backup Infrastructure and set to Locally-redundant.RSV4-1

I am going to create a custom policy as I only want to backup my test VM’s once a week. go to Manage > Backup policies and click Add.RSV3-2

Once in the new backup policy configure settings as required. I have set frequency to every sunday at 22:00 and set retention to 4 weeks backups. Click create once all settings are configured. RSV3-1

The policy should now be available to assign to backup jobs. Next step is to setup the backup. Go to Getting started > backup

Select where the work load is running (Azure or on prem), I only want to backup my Azure Lab VM so I selected Azure. Next select backup type

  • VM
  • Azure File Share (in preview at the time of the post)
  • SQL server in Azure VM (in preview at the time of the post)

Select the backup policy, I am using the policy created above. RSV5

Next select the VM’s that will be backed up. RSV6

Click enable backup to finish the config.

I will kick off a manual backup job to get an initial backup.

Click on backup Item > Azure Virtual Machine > Backup nowRSV8RSV9

To view backup jobs go to Monitoring > Backup JobsRSV7

Once the backup is complete, the option to run VM restore or file level recovery becomes available.RSV10

Azure Automation “Run Login-AzureAccount to login”

When I was creating my Azure Automation account and tried to run a runbook that needed to logon to Azure,  to start my VM’s I was getting an error:

Run Login-AzureAccount to login.AZAUError2

After looking on technet there where a few different recommendations but none worked.

In the end I just decided to try update the Azure modules. This fixed the issue.

Below is how to update the modules.

Go to Automation Accounts > select account > Modules

AZAUError1

There will be a prompt to update all Azure modules click yes to continue. AZAUError3

To view the progress click on below. AZAUError4

Click on all logs or output to view what is currently running. AZAUError5

Once completed the below will show. AZAUError6

After this I was successfully able to run my runbooks.